ME doesnt have any such thing as a "secure" password, your son can type in a different username and it will automatically create another account. (95, 98 and ME are all like that)

If you ever decide to change your OS, XP actually allows you to control which users use which programs and such.

What you want is a BIOS password.

One of three keys gets you into the BIOS: when you first turn on the computer, you should get a BIOS screen, and either Delete, F2 or F10 will get you into the actual BIOS.

From there, find the security option, go to "set password", and set the password. Don't ever forget it, and don't change any other settings in te BIOS.

I've never touched a ME box, I'm just typing up what my Tech support Fiancee is dictating to me. Sorry if it sounds really complicated... :-/